Arduino MKR1000 LED ARRAY

const int LED1 = 1;
const int LED2 = 2;
const int LED3 = 3;
const int LED4 = 4;
const int LED5 = 5;
const int LED6 = 6;
const int LED7 = 7;


void setup()
{
  pinMode(LED1,OUTPUT);
  pinMode(LED2,OUTPUT);
  pinMode(LED3,OUTPUT);
  pinMode(LED4,OUTPUT);
  pinMode(LED5,OUTPUT);
  pinMode(LED6,OUTPUT);
  pinMode(LED7,OUTPUT);
}

void loop()
{
  digitalWrite(LED1,HIGH);
  delay(72);
  digitalWrite(LED2,HIGH);
  digitalWrite(LED1,LOW);
  delay(72);
  digitalWrite(LED2,LOW);
digitalWrite(LED3,HIGH);



  delay(72);
  digitalWrite(LED4,HIGH);
  digitalWrite(LED3,LOW);
  delay(72);
  digitalWrite(LED4,LOW);
digitalWrite(LED5,HIGH);a


  delay(72);
  digitalWrite(LED6,HIGH);
  digitalWrite(LED5,LOW);
  delay(72);
  digitalWrite(LED6,LOW);
digitalWrite(LED7,HIGH);
 delay(72);
 digitalWrite(LED7,LOW);


}